You can bring it on board, or you can check it as long as you complete a release

From Delta:

Delta allows perishable items (both edible and non-edible) onboard as part of your carry-on baggage allowance as long as there is no violation of agricultural restrictions for the destination country.

Perishable items include:
Fresh or frozen foods, fruits, and vegetables
Meats, fish, poultry, or bakery products
Flowers of varying sorts including cut flowers, floral displays, and vegetable plants
If the item does not fit within our size or weight restrictions for carry-on baggage, we will accept the item within your checked baggage allowance once a limited liability release form has been completed. Delta will not accept liability of any perishable item that spoils or goes bad during its journey in cargo.